Almost new set of Yukon 4.56 gears for a 7.5" rear axle. Yukon makes one of the best gears out there. They were professionally installed by 4-wheel parts and only run on the truck for 1500 miles. The truck no longer has a 7.5" rear axle but has an 8.8" with 4.88 gears so these 4.56's aren't needed.